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Texas Instruments SN74ABT374ADBR
- Part No.:
- SN74ABT374ADBR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT374ADBR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,634
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Product details
Overview
SN74ABT374ADBR from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs in a 20-pin SSOP (DB) package, operating from –40°C to 85°C at 4.5–5.5 V supply. It delivers ±32-mA high-drive outputs, 150-MHz max clock frequency, and <1-V output ground bounce-designed for bidirectional bus driving in industrial control backplanes.
For engineers reviewing the SN74ABT374ADBR datasheet, SN74ABT374ADBR pinout, SN74ABT374ADBR application, or SN74ABT374ADBR equivalent, key selection criteria include 3-state output timing (tPZH = 1.2 ns typ), latch-up immunity (>500 mA), ESD robustness (>2000 V HBM), and compatibility with 5-V TTL/CMOS logic interfaces in space-constrained PCB layouts.
Technical Context
This device implements eight independent positive-edge-triggered D flip-flops with asynchronous 3-state output control via OE. Each stage latches D-input data on CLK↑ and holds state until next clock edge, while OE independently places outputs in high-impedance without affecting internal register operation.
Its EPIC-IIB BiCMOS process enables low dynamic power dissipation and high noise immunity. The design supports hot-swap-capable bus interfacing through fast enable/disable transitions (tPZL = 2.7 ns typ) and rail-to-rail output swing under heavy capacitive loads up to 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL systems and stable operation across industrial voltage tolerances. |
| Max Clock Frequency | 150 MHz - supports high-speed data latching in memory address buffers and synchronous bus interfaces. |
| Output Drive | –32 mA IOH / +64 mA IOL - drives heavily loaded buses directly without external pull-ups or buffers. |
| Propagation Delay | tPLH/tPHL = 2.2–6.2 ns - enables precise timing alignment in multi-stage pipeline registers. |
| 3-State Enable Time | tPZH = 1.2 ns typ - allows rapid bus arbitration and minimizes contention windows during shared-bus handshaking. |
| Operating Temperature | –40°C to +85°C - qualified for extended industrial environments including factory automation and motor control cabinets. |
| ESD Rating | >2000 V HBM - withstands handling and board-level electrostatic discharge in automated assembly lines. |
Pinout & Package
SN74ABT374ADBR uses a 20-pin Shrink Small-Outline Package (SSOP, DB), 7.5 mm × 5.6 mm × 1.75 mm body, with 0.65-mm lead pitch and moisture sensitivity level 1 (260°C reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control enabling/disabling all eight 3-state outputs simultaneously; does not affect internal flip-flop state. |
| 2–9 | 1Q–8Q (Outputs) | True outputs of each D flip-flop; tri-stated when OE = high, otherwise driven to logic level stored at last CLK↑. |
| 10 | GND | Power ground reference for all logic and output stages; requires low-inductance connection to minimize ground bounce. |
| 11 | VCC | +5-V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable high-speed switching. |
| 12–19 | 1D–8D (Data Inputs) | Asynchronous data inputs latched on rising CLK edge; must meet tsu = 1 ns (data high) and th = 2.1 ns hold requirements. |
| 20 | CLK | Global clock input triggering simultaneous edge-sensitive capture across all eight flip-flops. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive 3-State Outputs | ±32-mA drive capability eliminates need for external bus transceivers in 5-V backplane applications. |
| Low Ground Bounce | VOLP < 1 V at 5 V/25°C - reduces signal integrity risk in dense digital systems with shared ground planes. |
| Latch-Up Immunity | >500 mA per JEDEC JESD-17 - prevents destructive latch-up during transient overvoltage events in industrial settings. |
| Fast Output Enable/Disable | tPZH = 1.2 ns typ - enables sub-nanosecond bus turnaround for time-critical arbitration protocols. |
| BiCMOS Process | EPIC-IIB architecture balances CMOS input impedance with bipolar output speed and drive strength. |
Applications
| Industrial Backplane Buffering | Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Isolating and latching address/data signals between a microcontroller and modular I/O cards in a DIN-rail PLC chassis. IC Role / Device Role / Timing Role: Acts as an octal registered buffer synchronizing parallel bus transfers to system clock edges while providing 3-state isolation during card hot-swap. Use Value: Eliminates bus contention during module insertion/removal and supports deterministic timing with 150-MHz clock tolerance. |
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive 8-channel LED indicators and relay drivers in HVAC control panels. IC Role / Device Role / Timing Role: Provides synchronized output latching and high-current drive (64-mA sink) without external driver transistors. Use Value: Reduces BOM count by replacing discrete MOSFET arrays and simplifies firmware timing with single-cycle register updates. |
| Test Equipment Signal Conditioning | Legacy Bus Interface Adapter |
|
Use Scenario: Level-shifting and buffering TTL-compatible test signals between FPGA-based pattern generators and legacy instrumentation with 5-V CMOS inputs. IC Role / Device Role / Timing Role: Serves as a timing-aligned interface bridge with precise setup/hold margins (tsu = 1 ns, th = 2.1 ns) for jitter-sensitive measurement paths. Use Value: Guarantees signal fidelity across mixed-voltage domains while maintaining sub-ns timing correlation for high-accuracy waveform capture. |
Use Scenario: Adapting ISA bus data lines to modern microprocessor peripherals in retro-computing hardware restoration projects. IC Role / Device Role / Timing Role: Functions as a bidirectional data latch with OE-controlled directionality, matching ISA's 8-bit multiplexed address/data timing. Use Value: Enables direct pin-compatible integration into vintage PC motherboard designs without custom logic or timing adjustments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT374ADW | SOIC-20 package (7.5-mm width vs. DB's 5.6 mm); θJA = 97°C/W vs. 115°C/W; identical electrical specs. | Preferred where board real estate permits wider footprint and manual soldering is used; less suitable for fine-pitch automated assembly. | Select SN74ABT374ADW for prototyping or low-volume hand-assembled boards requiring easier rework access. |
| SN74LVTH374APWR | Lower-voltage 3.3-V operation (2.7–3.6 V); LVTH series with 32-mA drive but reduced noise margin vs. ABT's 5-V TTL compatibility. | Requires level translation when interfacing with legacy 5-V systems; unsuitable for direct replacement without voltage domain redesign. | Choose SN74LVTH374APWR only in new 3.3-V-only designs where power efficiency outweighs backward compatibility needs. |
Compared with SN74ABT374ADW and SN74LVTH374APWR, the SN74ABT374ADBR offers optimal trade-offs for industrial 5-V systems: smallest PCB area among ABT-series variants, full 5-V TTL interoperability, and proven latch-up resilience-making it ideal for space-constrained, high-reliability embedded controllers.
Availability
SN74ABT374ADBR is available at Aetrix Electronics and suitable for industrial backplane buffering, microcontroller I/O expansion, test equipment signal conditioning, and legacy bus interface adapter applications requiring stable component supply across extended temperature ranges.
Supply support for SN74ABT374ADBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic ICs, with decades of expertise in high-reliability industrial and automotive-grade components.
The SN74ABT374A family was engineered for robust 5-V bus interfacing in harsh environments-delivering high drive, fast timing, and latch-up immunity in compact surface-mount packages for programmable logic and control systems.
FAQ
What is the maximum clock frequency supported by the SN74ABT374ADBR?
The SN74ABT374ADBR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 5 V, TA = 25°C). This rating is validated across the full industrial temperature range (–40°C to 85°C) and ensures reliable edge-triggered data capture in high-speed synchronous bus applications. The SN74ABT374ADBR maintains timing integrity even with CL = 50 pF loads.
Does the SN74ABT374ADBR require external pull-up resistors on the OE pin?
Yes-the SN74ABT374ADBR datasheet recommends tying OE to VCC through a pull-up resistor during power-up/down to guarantee outputs remain in high-impedance state. Minimum resistor value depends on the current-sinking capability of the driving source; typical values range from 4.7 kΩ to 10 kΩ for standard logic drivers. This prevents bus contention before system initialization completes.
Can the SN74ABT374ADBR operate reliably at 4.5 V supply voltage?
Yes-the SN74ABT374ADBR is fully specified for operation from 4.5 V to 5.5 V. At VCC = 4.5 V, it maintains guaranteed output drive (–32 mA IOH, +64 mA IOL), timing performance (tPLH ≤ 6.2 ns), and noise margins (VIH = 2.0 V min, VIL = 0.8 V max). This makes the SN74ABT374ADBR suitable for brown-out tolerant industrial systems.
What is the thermal resistance (θJA) of the SN74ABT374ADBR in its SSOP package?
The SN74ABT374ADBR in the DB (SSOP-20) package has a junction-to-ambient thermal resistance (θJA) of 115°C/W, measured per JEDEC Std JESD51. This value assumes standard PCB layout with 1-in² copper pour and two internal ground/power planes. For sustained 64-mA output loading, derating curves indicate safe continuous operation up to +75°C ambient with adequate board-level heat sinking.
Is the SN74ABT374ADBR RoHS compliant and lead-free?
Yes-the SN74ABT374ADBR is RoHS compliant and features NiPdAu (NIPDAU) lead finish. It meets JEDEC MSL Level-1 (unlimited floor life at ≤30°C/60% RH) and is rated for peak reflow temperatures up to 260°C. The part marking "AB374A" and tape-and-reel packaging (2000 units per reel, Q1 pin orientation) confirm full compliance with current environmental regulations.
SN74ABT374ADBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 200 MHz
- Max Propagation Delay @ V, Max CL:
- 6.6ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 250 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SN74ABT374ADBR FAQ
1.How can I place an order for SN74ABT374ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT374ADBR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74ABT374ADBR reliable?
The price and inventory of SN74ABT374ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT374ADBR is usually 5 days.
3.What payment methods are accepted for SN74ABT374ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT374ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT374ADBR?
SN74ABT374ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT374ADBR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74ABT374ADBR?
For technical support, including SN74ABT374ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT374ADBR requirements.
6.How does Aetrix verify that SN74ABT374ADBR is sourced from the original manufacturer or authorized distributors?
All SN74ABT374ADBR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ABT374ADBR meets industry standards.
7.What is the process for return or replacement of SN74ABT374ADBR?
All SN74ABT374ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT374ADBR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74ABT374ADBR part is unused and in its original packaging.
Return procedure for SN74ABT374ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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